Ok...here is something.

From the 'Show N/A' list...I chose a track that was supposedly , well N/A. And it loaded. Or at least SOMETHING loaded that fits the description. I honestly don't know what all of the RTs are supposed to sound like so i can't be sure. But it did load.

Maybe that sheds some light? maybe I am missing nothing? Maybe 75 RTs? Maybe 652 RTs? LOL!